Magnetic pulse welding
Magnetic pulse welding is a non-contact process where capacitors generate magnetic forces that rapidly bring the parts together and join them.
Physical-Chemical Mechanism of Action
Magnetic pulse welding uses rapid capacitor discharges to generate magnetic fields. These pull the workpieces together and drive them into each other at high speed, causing surface melting.
Metallurgical Relevance & Welding Risks
This process is especially useful for thin-walled or hard-to-reach parts. It avoids mechanical stresses and can be used in tight spaces. However, inaccurate adjustment of the magnetic fields can lead to non-uniform melting, which can result in stresses and potential cracks in the microstructure.
Workshop Practice & Instructions
For successful execution, it is crucial to precisely adjust the magnetic fields and control the discharge voltage and time. Non-uniform melting can be avoided by adjusting the field strength or the distance between the workpieces. Recommended voltages are 100 to 300 kV, and the discharge time is typically 50 to 200 microseconds.